Finding the Fourth Proportional to 286.21, 394.94 and 161.85
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Solution
The fourth proportional to 286.21, 394.94 and 161.85 is: 223.34
Step by Step Solution
- Step 1: Write the proportion equation
286.21 : 394.94 = 161.85 : x - Step 2: Convert to fraction form
286.21/394.94 = 161.85/x - Step 3: Cross multiply
286.21x = 394.94 × 161.85 - Step 4: Simplify right side
286.21x = 63,920.23 - Step 5: Solve for x
x = 63,920.23/286.21 - Step 6: Final answer
x = 223.34
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.